diff --git a/travis/format_release_info.php b/travis/format_release_info.php
index 02712b756..b846b75f9 100644
--- a/travis/format_release_info.php
+++ b/travis/format_release_info.php
@@ -157,6 +157,13 @@ $ICONS_URL = "https://github.com/jindrapetrik/jpexs-decompiler/wiki/images";
 
 $body = "";
 
+$is_prerelease = $changelog_section === "Unreleased";
+
+if($is_prerelease) {
+   $body .= "## Prerelease WARNING\n".
+            "**This is prerelease nightly version. It should *NOT* be considered as stable.**\n\n";
+}   
+
 $body .= "## Downloads:\n".
       "\n".
       "| Name | File | OS |\n".
@@ -225,7 +232,12 @@ if($changelog_data === false)
 }
 
 $body .= "\n";
-$body .= "## What's new:\n";
+if($is_prerelease)
+{
+   $body .= "## What's new since last stable version:\n";
+}else{
+   $body .= "## What's new:\n";
+}
 $body .= $changelog_data;
 $body .= "\n";
 foreach($footer_links as $title=>$link)
diff --git a/travis/script.sh b/travis/script.sh
index 836c02d9b..ee651939b 100644
--- a/travis/script.sh
+++ b/travis/script.sh
@@ -97,7 +97,7 @@ else
       export DEPLOY_FILEVER_TAG="${VERSION_NUMBER}_nightly${NEXT_NIGHTLY_VER}"                          
       export DEPLOY_RELEASE_TO_REMOVE=$LAST_NIGHTLY_TAG                                 
       export DEPLOY_TAG_NAME=$NEXT_NIGHTLY_TAG
-      export DEPLOY_VERSION_NAME="version $LAST_STABLE_VER nightly $NEXT_NIGHTLY_VER"
+      export DEPLOY_VERSION_NAME="(PREVIEW) version $LAST_STABLE_VER nightly $NEXT_NIGHTLY_VER"
       export DEPLOY_DESCRIPTION=`php ./travis/format_release_info.php -filever $DEPLOY_FILEVER_TAG Unreleased $DEPLOY_TAG_NAME ./CHANGELOG.md "$TRAVIS_REPO_SLUG"`
       export DEPLOY_COMMITISH="dev"
       export DEPLOY_PRERELEASE=true